Why? It does everything a non-techie would expect from browser and it performs well, why switch to something else?
That said I think Chrome is a terrible Chromium based browser. Edge and Vivaldi in my opinion are much better options. Edge for most folk and Vivaldi for more adventurous types.
There have been quite a few questionable decisions by Mozilla though, they have focused on some very weird things, not to mention scandals about management salaries (No idea how it is now). I really really hope they will not follow suite which honestly is not as far fetched as one could think.